Isaiah 26:3

You will keep in perfect and constant peace the one whose mind is steadfast (that is, committed and focused on You-in both inclination and character), Because he trusts and takes refuge in You (with hope and confident expectation).

When we make a decision, we delineate the direction and focus of our character. When we decide to live our lives in peace, we choose to avoid or confront anything that leads to strife. Peace is a safe harbor in the storm and maintains our health and joy.